These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
Lanthanide complexes with a tripodal nitroxyl radical showing strong magnetic coupling.pdf (1.2 MB)

Lanthanide Complexes with a Tripodal Nitroxyl Radical Showing Strong Magnetic Coupling

revised on 15.08.2020, 11:43 and posted on 17.08.2020, 07:56 by Mauro Perfetti, Andrea Caneschi, Taisiya S. Sukhikh, Kira E. Vostrikova
A series of isomorphous mononuclear complexes of Ln(III) ions comprising one stable tripoidal oxazolidine nitroxyl radical were obtained in acetonitrile media starting from nitrates. The compounds, [LnRad(NO3)3] (Ln = Gd, Tb, Dy, Tm, Y; Rad = 4,4-dimethyl-2,2-bis(pyridin-2-yl)-1,3-oxazolidine-3-oxyl), have molecular structure. Their coordination polyhedron, LnO7N2, can be described as a tricapped trigonal prism with symmetry close to D3h. The value of 23 cm-1 for the antiferromagnetic coupling Gd-Rad established from the DC magnetic and EPR data is a record strength for the complexes of 4f-elements with nitroxyl radicals. The terbium derivative displays frequency-dependent out-of-phase signals in zero field indicating single-molecule magnetic behavior with an effective barrier of 57 cm-1.


RFBR, research project № 20-33-70172


Email Address of Submitting Author


Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences



ORCID For Submitting Author


Declaration of Conflict of Interest

no conflict interests

Version Notes

second version